Harry Styles is ''totally in love'' with Taylor Swift.The One Direction heartthrob is completely smitten with the 'Love Story' singer and friends believe the pair are even considering marriage, even though they only recently started dating. A source told Us Weekly: ''This [relationship] has gone from zero to 60 in seconds. ''Harry is totally in love. I can see them getting married in a week, just going for it.'' Things are so serious between the couple that Taylor, 23, recently visited 18-year-old Harry's mother Anne in Cheshire, North West England, and is reportedly planning to buy a country retreat there. A source previously said: ''Harry and Taylor are crazy about each other. They just got back to LA together, after sharing a week-long vacation in England. ''While they were in the UK, they had a chance to drive up to Harry's mom's place in Cheshire and Taylor fell in love with the gorgeous countryside. ''They spent a day in Holmes Chapel, with Harry's mom Anne and his sister Gemma, before driving up to the Lake District. ''Taylor would love a really old, thick-walled cottage with a fire place. ''Harry's mother and sister have vowed to help her find the perfect place!''